Kinematic viscosity-composition data for eight n-alkane binary liquid systems, viz., octane + undecane, octane + tridecane, octane + pentadecane, decane + pentadecane,;undecane + pentadecane, tridedane + pentadecane, decane + tridecane and undecane + tridecane, were measured over the entire composition range at 308.15 and 313.15 K and at atmospheric pressure. The data have been correlated by Heric's model [E.L. Heric, J.G. Brewer, J. Chem. Eng. Data 12 (1967) 574-583.], as well as by the McAllister three-body interaction model [R.A. McAllister, AIChE J. 6 (1960) 427-431.].